[tz] Time for a Lunar time zone? -Brooks

[Brooks Harris]

On 2024-07-11 06:07 AM, Paul Eggert wrote:
> On 7/11/24 03:44, Brooks Harris wrote:
>> On 2023-03-02 04:47 PM, Paul Eggert wrote:
>>> Presumably ESA's boffins are on top of this.....
>>>
>> Researchers more precisely calculate how much faster time passes on 
>> the moon
>> https://phys.org/news/2024-07-precisely-faster-moon.html
>
> That news article says "the team found that time on the moon ticks by 
> at 0.0000575 seconds faster per day (57.50 µs/d) than it does on Earth."
>
> But the paper <https://arxiv.org/pdf/2406.16147> says this figure 
> needs to be adjusted for the total orbital energies for the Earth and 
> Moon, and later gives an adjusted figure of "56.02 μs/d, with the 
> clock on the Moon’s surface running faster by that amount compared to 
> a terrestrial clock. Additionally, there are periodic terms, the 
> largest of which is due to the lunar orbit around the Earth that 
> amounts to about 30.95 μs/d ...".
>
> Clearly precise lunar timekeeping will not be a trivial matter.
>
> It's still not clear to me what the relationship between the ESA and 
> NASA is on this. Will there be a single standard for lunar 
> timekeeping, or multiple standards? Will this be like the squabbles 
> over the Prime Median in the 19th century?
>
Is there a Prime Meridian on the Moon? Will there be Lunar Time Zones?